I stayed here for a month and really enjoyed the amenities of the building and the location. The view of the rooftop pool is even better than the views of the surrounding rooftop bars. The pool and the gym were also never too crowded.
The room itself was clean and had everything one would need: stable fast 50mbps WiFi, big smart TV, washing machine and a balcony to dry the clothes. Only small downside was that the temperature of the shower takes a while to adjust and is hard to calibrate.
The location is close to BTS Nana in a famous tourist street, but you don't hear much of the noise as the apartment is further down a side alley. Terminal 21 and many other great food options are within a walkable area.
Bird was a really nice host and answered all questions I had. She even took me to taste some Thai dinners with her mom when I arrived. I'd definitely stay here again if I come back to Bangkok